| 查看: 1807 | 回复: 11 | ||||
| 当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖 | ||||
coolyuruizhi金虫 (小有名气)
|
[交流]
JMCA 上面的一篇聚苯胺包覆富锂的文章 已有6人参与
|
|||
|
In situ polyaniline modified cathode material Li[Li0.2Mn0.54Ni0.13Co0.13]O2 with high rate capacity for lithium ion batteries Lithium-rich layered Li[Li0.2Mn0.54Ni0.13Co0.13]O2 is prepared by a fast co-precipitation method and surface modified with conducting polyaniline (PANI, 5 wt%, 10 wt%, 15 wt%, 20 wt%, 30 wt% theoretically) via in situ chemical oxidation polymerization to optimize the electrochemical properties. The uniform PANI layer with a thickness of 5 nm (10 wt%) has been successfully coated on the surface of Li[Li0.2Mn0.54Ni0.13Co0.13]O2 particles, as observed by field-emission scanning electron microscopy (FESEM) and high resolution transmission electron microscopy (HRTEM). The X-ray powder diffraction (XRD) results show that all the prepared samples have a typical layered hexagonal a-NaFeO2 structure. The PANI layer maintains the integrity of the surface material crystal structure of the Li[Li0.2Mn0.54Ni0.13Co0.13]O2 particles by protecting the electrodes from external erosion during continuous charge–discharge cycles. PANIcoated Li[Li0.2Mn0.54Ni0.13Co0.13]O2 electrodes present excellent electrochemical properties at room temperature. The initial discharge capacity is 313.5 mA h g 1 (0.05 C) with a coulombic efficiency of 89.01% (PANI, 10 wt%), compared with 291.9 mA h g 1 (0.05 C) for the pristine Li[Li0.2Mn0.54Ni0.13Co0.13]- O2 with a coulombic efficiency of 81.31% in the potential range 2.0–4.8 V (vs. Li/Li+). The discharge capacity is retained at 282.1 mA h g 1 after 80 cycles at 0.1 C. Moreover, the PANI-coated Li [Li0.2Mn0.54Ni0.13Co0.13]O2 exhibits an excellent high rate capacity of 198.6 mA h g 1 at 10 C. The electrochemical impedance spectra (EIS) measurements reveal that the thin PANI coating layer significantly optimizes the interfacial electrochemical reaction activity by reducing the charge transfer resistance. Moreover, the special H +/Li+ exchange reaction during the proton acid doping procedure also promotes the improvement of the electrochemical performance |
回复此楼» 本帖附件资源列表
-
欢迎监督和反馈：小木虫仅提供交流平台，不对该内容负责。
本内容由用户自主发布，如果其内容涉及到知识产权问题，其责任在于用户本人，如对版权有异议，请联系邮箱：xiaomuchong@tal.com - 附件 1 : 2014-In_situ_polyaniline_modified_cathode_material_LiLi0.2Mn0.54Ni0.13Co0.13O2_with_high_rate_capacity_for_lithium_ion_batteries.pdf
2014-11-05 20:26:53, 1.73 M
» 收录本帖的淘帖专辑推荐
 锂论 论锂 |
» 猜你喜欢
求调剂一志愿海大，0703化学学硕304分，有大创项目，四级已过
已经有10人回复
-
070300 求调剂
已经有1人回复
-
分析化学论文润色/翻译怎么收费?
已经有80人回复
-
深圳大学高等研究院赵伟课题组招收化学调剂生
已经有3人回复
-
青岛大学固态电池研究团队招收材料、化学、物理等方向博士研究生
已经有31人回复
-
化学工程085602 305分求调剂
已经有17人回复
-
龋病与牙周病的表述
已经有1人回复
-
070300化学求调剂
已经有12人回复
-
武汉纺织大学全国重点实验室杨应奎教授团队拟招17-19位硕博生！
已经有0人回复
-
材料与化工专硕接受跨专业调剂（重庆市属高校）
已经有0人回复
-
武汉纺织大学全国重点实验室杨应奎教授团队拟招17-19位硕博生！
已经有0人回复
» 本主题相关价值贴推荐，对您同样有帮助:
- 聚苯胺包覆无机物后的XRD为什么没有聚苯胺的峰？
已经有7人回复
- 【求助】关于聚苯胺包覆实验
已经有10人回复
0.8
| 顶一下，感谢分享！ |
3楼2014-11-05 22:46:07
0.8
| 顶一下，感谢分享！ |
2楼2014-11-05 21:10:15
0.8
| 顶一下，感谢分享！ |
4楼2014-11-06 07:28:40
0.8
| 顶一下，感谢分享！ |
5楼2014-11-06 08:12:30
